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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2008 The Guava Authors<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package com.google.common.collect;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import static com.google.common.base.Preconditions.checkArgument;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import static com.google.common.base.Preconditions.checkNotNull;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import com.google.common.annotations.Beta;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import com.google.common.annotations.GwtCompatible;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import com.google.common.base.Function;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import com.google.common.base.Supplier;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.io.Serializable;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.Comparator;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.Iterator;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.util.Map;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.util.NoSuchElementException;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import java.util.Set;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import java.util.SortedMap;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import java.util.SortedSet;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import java.util.TreeMap;<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>import javax.annotation.Nullable;<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span>/**<a name="line.39"></a>
<span class="sourceLineNo">040</span> * Implementation of {@code Table} whose row keys and column keys are ordered<a name="line.40"></a>
<span class="sourceLineNo">041</span> * by their natural ordering or by supplied comparators. When constructing a<a name="line.41"></a>
<span class="sourceLineNo">042</span> * {@code TreeBasedTable}, you may provide comparators for the row keys and<a name="line.42"></a>
<span class="sourceLineNo">043</span> * the column keys, or you may use natural ordering for both.<a name="line.43"></a>
<span class="sourceLineNo">044</span> *<a name="line.44"></a>
<span class="sourceLineNo">045</span> * &lt;p&gt;The {@link #rowKeySet} method returns a {@link SortedSet} and the {@link<a name="line.45"></a>
<span class="sourceLineNo">046</span> * #rowMap} method returns a {@link SortedMap}, instead of the {@link Set} and<a name="line.46"></a>
<span class="sourceLineNo">047</span> * {@link Map} specified by the {@link Table} interface.<a name="line.47"></a>
<span class="sourceLineNo">048</span> *<a name="line.48"></a>
<span class="sourceLineNo">049</span> * &lt;p&gt;The views returned by {@link #column}, {@link #columnKeySet()}, and {@link<a name="line.49"></a>
<span class="sourceLineNo">050</span> * #columnMap()} have iterators that don't support {@code remove()}. Otherwise,<a name="line.50"></a>
<span class="sourceLineNo">051</span> * all optional operations are supported. Null row keys, columns keys, and<a name="line.51"></a>
<span class="sourceLineNo">052</span> * values are not supported.<a name="line.52"></a>
<span class="sourceLineNo">053</span> *<a name="line.53"></a>
<span class="sourceLineNo">054</span> * &lt;p&gt;Lookups by row key are often faster than lookups by column key, because<a name="line.54"></a>
<span class="sourceLineNo">055</span> * the data is stored in a {@code Map&lt;R, Map&lt;C, V&gt;&gt;}. A method call like {@code<a name="line.55"></a>
<span class="sourceLineNo">056</span> * column(columnKey).get(rowKey)} still runs quickly, since the row key is<a name="line.56"></a>
<span class="sourceLineNo">057</span> * provided. However, {@code column(columnKey).size()} takes longer, since an<a name="line.57"></a>
<span class="sourceLineNo">058</span> * iteration across all row keys occurs.<a name="line.58"></a>
<span class="sourceLineNo">059</span> *<a name="line.59"></a>
<span class="sourceLineNo">060</span> * &lt;p&gt;Because a {@code TreeBasedTable} has unique sorted values for a given<a name="line.60"></a>
<span class="sourceLineNo">061</span> * row, both {@code row(rowKey)} and {@code rowMap().get(rowKey)} are {@link<a name="line.61"></a>
<span class="sourceLineNo">062</span> * SortedMap} instances, instead of the {@link Map} specified in the {@link<a name="line.62"></a>
<span class="sourceLineNo">063</span> * Table} interface.<a name="line.63"></a>
<span class="sourceLineNo">064</span> *<a name="line.64"></a>
<span class="sourceLineNo">065</span> * &lt;p&gt;Note that this implementation is not synchronized. If multiple threads<a name="line.65"></a>
<span class="sourceLineNo">066</span> * access this table concurrently and one of the threads modifies the table, it<a name="line.66"></a>
<span class="sourceLineNo">067</span> * must be synchronized externally.<a name="line.67"></a>
<span class="sourceLineNo">068</span> *<a name="line.68"></a>
<span class="sourceLineNo">069</span> * &lt;p&gt;See the Guava User Guide article on &lt;a href=<a name="line.69"></a>
<span class="sourceLineNo">070</span> * "http://code.google.com/p/guava-libraries/wiki/NewCollectionTypesExplained#Table"&gt;<a name="line.70"></a>
<span class="sourceLineNo">071</span> * {@code Table}&lt;/a&gt;.<a name="line.71"></a>
<span class="sourceLineNo">072</span> *<a name="line.72"></a>
<span class="sourceLineNo">073</span> * @author Jared Levy<a name="line.73"></a>
<span class="sourceLineNo">074</span> * @author Louis Wasserman<a name="line.74"></a>
<span class="sourceLineNo">075</span> * @since 7.0<a name="line.75"></a>
<span class="sourceLineNo">076</span> */<a name="line.76"></a>
<span class="sourceLineNo">077</span>@GwtCompatible(serializable = true)<a name="line.77"></a>
<span class="sourceLineNo">078</span>@Beta<a name="line.78"></a>
<span class="sourceLineNo">079</span>public class TreeBasedTable&lt;R, C, V&gt; extends StandardRowSortedTable&lt;R, C, V&gt; {<a name="line.79"></a>
<span class="sourceLineNo">080</span>  private final Comparator&lt;? super C&gt; columnComparator;<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>  private static class Factory&lt;C, V&gt;<a name="line.82"></a>
<span class="sourceLineNo">083</span>      implements Supplier&lt;TreeMap&lt;C, V&gt;&gt;, Serializable {<a name="line.83"></a>
<span class="sourceLineNo">084</span>    final Comparator&lt;? super C&gt; comparator;<a name="line.84"></a>
<span class="sourceLineNo">085</span>    Factory(Comparator&lt;? super C&gt; comparator) {<a name="line.85"></a>
<span class="sourceLineNo">086</span>      this.comparator = comparator;<a name="line.86"></a>
<span class="sourceLineNo">087</span>    }<a name="line.87"></a>
<span class="sourceLineNo">088</span>    @Override<a name="line.88"></a>
<span class="sourceLineNo">089</span>    public TreeMap&lt;C, V&gt; get() {<a name="line.89"></a>
<span class="sourceLineNo">090</span>      return new TreeMap&lt;C, V&gt;(comparator);<a name="line.90"></a>
<span class="sourceLineNo">091</span>    }<a name="line.91"></a>
<span class="sourceLineNo">092</span>    private static final long serialVersionUID = 0;<a name="line.92"></a>
<span class="sourceLineNo">093</span>  }<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>  /**<a name="line.95"></a>
<span class="sourceLineNo">096</span>   * Creates an empty {@code TreeBasedTable} that uses the natural orderings<a name="line.96"></a>
<span class="sourceLineNo">097</span>   * of both row and column keys.<a name="line.97"></a>
<span class="sourceLineNo">098</span>   *<a name="line.98"></a>
<span class="sourceLineNo">099</span>   * &lt;p&gt;The method signature specifies {@code R extends Comparable} with a raw<a name="line.99"></a>
<span class="sourceLineNo">100</span>   * {@link Comparable}, instead of {@code R extends Comparable&lt;? super R&gt;},<a name="line.100"></a>
<span class="sourceLineNo">101</span>   * and the same for {@code C}. That's necessary to support classes defined<a name="line.101"></a>
<span class="sourceLineNo">102</span>   * without generics.<a name="line.102"></a>
<span class="sourceLineNo">103</span>   */<a name="line.103"></a>
<span class="sourceLineNo">104</span>  public static &lt;R extends Comparable, C extends Comparable, V&gt;<a name="line.104"></a>
<span class="sourceLineNo">105</span>      TreeBasedTable&lt;R, C, V&gt; create() {<a name="line.105"></a>
<span class="sourceLineNo">106</span>    return new TreeBasedTable&lt;R, C, V&gt;(Ordering.natural(),<a name="line.106"></a>
<span class="sourceLineNo">107</span>        Ordering.natural());<a name="line.107"></a>
<span class="sourceLineNo">108</span>  }<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span>  /**<a name="line.110"></a>
<span class="sourceLineNo">111</span>   * Creates an empty {@code TreeBasedTable} that is ordered by the specified<a name="line.111"></a>
<span class="sourceLineNo">112</span>   * comparators.<a name="line.112"></a>
<span class="sourceLineNo">113</span>   *<a name="line.113"></a>
<span class="sourceLineNo">114</span>   * @param rowComparator the comparator that orders the row keys<a name="line.114"></a>
<span class="sourceLineNo">115</span>   * @param columnComparator the comparator that orders the column keys<a name="line.115"></a>
<span class="sourceLineNo">116</span>   */<a name="line.116"></a>
<span class="sourceLineNo">117</span>  public static &lt;R, C, V&gt; TreeBasedTable&lt;R, C, V&gt; create(<a name="line.117"></a>
<span class="sourceLineNo">118</span>      Comparator&lt;? super R&gt; rowComparator,<a name="line.118"></a>
<span class="sourceLineNo">119</span>      Comparator&lt;? super C&gt; columnComparator) {<a name="line.119"></a>
<span class="sourceLineNo">120</span>    checkNotNull(rowComparator);<a name="line.120"></a>
<span class="sourceLineNo">121</span>    checkNotNull(columnComparator);<a name="line.121"></a>
<span class="sourceLineNo">122</span>    return new TreeBasedTable&lt;R, C, V&gt;(rowComparator, columnComparator);<a name="line.122"></a>
<span class="sourceLineNo">123</span>  }<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span>  /**<a name="line.125"></a>
<span class="sourceLineNo">126</span>   * Creates a {@code TreeBasedTable} with the same mappings and sort order<a name="line.126"></a>
<span class="sourceLineNo">127</span>   * as the specified {@code TreeBasedTable}.<a name="line.127"></a>
<span class="sourceLineNo">128</span>   */<a name="line.128"></a>
<span class="sourceLineNo">129</span>  public static &lt;R, C, V&gt; TreeBasedTable&lt;R, C, V&gt; create(<a name="line.129"></a>
<span class="sourceLineNo">130</span>      TreeBasedTable&lt;R, C, ? extends V&gt; table) {<a name="line.130"></a>
<span class="sourceLineNo">131</span>    TreeBasedTable&lt;R, C, V&gt; result<a name="line.131"></a>
<span class="sourceLineNo">132</span>        = new TreeBasedTable&lt;R, C, V&gt;(<a name="line.132"></a>
<span class="sourceLineNo">133</span>            table.rowComparator(), table.columnComparator());<a name="line.133"></a>
<span class="sourceLineNo">134</span>    result.putAll(table);<a name="line.134"></a>
<span class="sourceLineNo">135</span>    return result;<a name="line.135"></a>
<span class="sourceLineNo">136</span>  }<a name="line.136"></a>
<span class="sourceLineNo">137</span><a name="line.137"></a>
<span class="sourceLineNo">138</span>  TreeBasedTable(Comparator&lt;? super R&gt; rowComparator,<a name="line.138"></a>
<span class="sourceLineNo">139</span>      Comparator&lt;? super C&gt; columnComparator) {<a name="line.139"></a>
<span class="sourceLineNo">140</span>    super(new TreeMap&lt;R, Map&lt;C, V&gt;&gt;(rowComparator),<a name="line.140"></a>
<span class="sourceLineNo">141</span>        new Factory&lt;C, V&gt;(columnComparator));<a name="line.141"></a>
<span class="sourceLineNo">142</span>    this.columnComparator = columnComparator;<a name="line.142"></a>
<span class="sourceLineNo">143</span>  }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>  // TODO(jlevy): Move to StandardRowSortedTable?<a name="line.145"></a>
<span class="sourceLineNo">146</span><a name="line.146"></a>
<span class="sourceLineNo">147</span>  /**<a name="line.147"></a>
<span class="sourceLineNo">148</span>   * Returns the comparator that orders the rows. With natural ordering,<a name="line.148"></a>
<span class="sourceLineNo">149</span>   * {@link Ordering#natural()} is returned.<a name="line.149"></a>
<span class="sourceLineNo">150</span>   */<a name="line.150"></a>
<span class="sourceLineNo">151</span>  public Comparator&lt;? super R&gt; rowComparator() {<a name="line.151"></a>
<span class="sourceLineNo">152</span>    return rowKeySet().comparator();<a name="line.152"></a>
<span class="sourceLineNo">153</span>  }<a name="line.153"></a>
<span class="sourceLineNo">154</span><a name="line.154"></a>
<span class="sourceLineNo">155</span>  /**<a name="line.155"></a>
<span class="sourceLineNo">156</span>   * Returns the comparator that orders the columns. With natural ordering,<a name="line.156"></a>
<span class="sourceLineNo">157</span>   * {@link Ordering#natural()} is returned.<a name="line.157"></a>
<span class="sourceLineNo">158</span>   */<a name="line.158"></a>
<span class="sourceLineNo">159</span>  public Comparator&lt;? super C&gt; columnComparator() {<a name="line.159"></a>
<span class="sourceLineNo">160</span>    return columnComparator;<a name="line.160"></a>
<span class="sourceLineNo">161</span>  }<a name="line.161"></a>
<span class="sourceLineNo">162</span><a name="line.162"></a>
<span class="sourceLineNo">163</span>  // TODO(user): make column return a SortedMap<a name="line.163"></a>
<span class="sourceLineNo">164</span><a name="line.164"></a>
<span class="sourceLineNo">165</span>  /**<a name="line.165"></a>
<span class="sourceLineNo">166</span>   * {@inheritDoc}<a name="line.166"></a>
<span class="sourceLineNo">167</span>   *<a name="line.167"></a>
<span class="sourceLineNo">168</span>   * &lt;p&gt;Because a {@code TreeBasedTable} has unique sorted values for a given<a name="line.168"></a>
<span class="sourceLineNo">169</span>   * row, this method returns a {@link SortedMap}, instead of the {@link Map}<a name="line.169"></a>
<span class="sourceLineNo">170</span>   * specified in the {@link Table} interface.<a name="line.170"></a>
<span class="sourceLineNo">171</span>   * @since 10.0<a name="line.171"></a>
<span class="sourceLineNo">172</span>   *     (&lt;a href="http://code.google.com/p/guava-libraries/wiki/Compatibility"<a name="line.172"></a>
<span class="sourceLineNo">173</span>   *     &gt;mostly source-compatible&lt;/a&gt; since 7.0)<a name="line.173"></a>
<span class="sourceLineNo">174</span>   */<a name="line.174"></a>
<span class="sourceLineNo">175</span>  @Override<a name="line.175"></a>
<span class="sourceLineNo">176</span>  public SortedMap&lt;C, V&gt; row(R rowKey) {<a name="line.176"></a>
<span class="sourceLineNo">177</span>    return new TreeRow(rowKey);<a name="line.177"></a>
<span class="sourceLineNo">178</span>  }<a name="line.178"></a>
<span class="sourceLineNo">179</span><a name="line.179"></a>
<span class="sourceLineNo">180</span>  private class TreeRow extends Row implements SortedMap&lt;C, V&gt; {<a name="line.180"></a>
<span class="sourceLineNo">181</span>    @Nullable final C lowerBound;<a name="line.181"></a>
<span class="sourceLineNo">182</span>    @Nullable final C upperBound;<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span>    TreeRow(R rowKey) {<a name="line.184"></a>
<span class="sourceLineNo">185</span>      this(rowKey, null, null);<a name="line.185"></a>
<span class="sourceLineNo">186</span>    }<a name="line.186"></a>
<span class="sourceLineNo">187</span><a name="line.187"></a>
<span class="sourceLineNo">188</span>    TreeRow(R rowKey, @Nullable C lowerBound, @Nullable C upperBound) {<a name="line.188"></a>
<span class="sourceLineNo">189</span>      super(rowKey);<a name="line.189"></a>
<span class="sourceLineNo">190</span>      this.lowerBound = lowerBound;<a name="line.190"></a>
<span class="sourceLineNo">191</span>      this.upperBound = upperBound;<a name="line.191"></a>
<span class="sourceLineNo">192</span>      checkArgument(lowerBound == null || upperBound == null<a name="line.192"></a>
<span class="sourceLineNo">193</span>          || compare(lowerBound, upperBound) &lt;= 0);<a name="line.193"></a>
<span class="sourceLineNo">194</span>    }<a name="line.194"></a>
<span class="sourceLineNo">195</span><a name="line.195"></a>
<span class="sourceLineNo">196</span>    @Override public Comparator&lt;? super C&gt; comparator() {<a name="line.196"></a>
<span class="sourceLineNo">197</span>      return columnComparator();<a name="line.197"></a>
<span class="sourceLineNo">198</span>    }<a name="line.198"></a>
<span class="sourceLineNo">199</span><a name="line.199"></a>
<span class="sourceLineNo">200</span>    int compare(Object a, Object b) {<a name="line.200"></a>
<span class="sourceLineNo">201</span>      // pretend we can compare anything<a name="line.201"></a>
<span class="sourceLineNo">202</span>      @SuppressWarnings({"rawtypes", "unchecked"})<a name="line.202"></a>
<span class="sourceLineNo">203</span>      Comparator&lt;Object&gt; cmp = (Comparator) comparator();<a name="line.203"></a>
<span class="sourceLineNo">204</span>      return cmp.compare(a, b);<a name="line.204"></a>
<span class="sourceLineNo">205</span>    }<a name="line.205"></a>
<span class="sourceLineNo">206</span><a name="line.206"></a>
<span class="sourceLineNo">207</span>    boolean rangeContains(@Nullable Object o) {<a name="line.207"></a>
<span class="sourceLineNo">208</span>      return o != null &amp;&amp; (lowerBound == null || compare(lowerBound, o) &lt;= 0)<a name="line.208"></a>
<span class="sourceLineNo">209</span>          &amp;&amp; (upperBound == null || compare(upperBound, o) &gt; 0);<a name="line.209"></a>
<span class="sourceLineNo">210</span>    }<a name="line.210"></a>
<span class="sourceLineNo">211</span><a name="line.211"></a>
<span class="sourceLineNo">212</span>    @Override public SortedMap&lt;C, V&gt; subMap(C fromKey, C toKey) {<a name="line.212"></a>
<span class="sourceLineNo">213</span>      checkArgument(rangeContains(checkNotNull(fromKey))<a name="line.213"></a>
<span class="sourceLineNo">214</span>          &amp;&amp; rangeContains(checkNotNull(toKey)));<a name="line.214"></a>
<span class="sourceLineNo">215</span>      return new TreeRow(rowKey, fromKey, toKey);<a name="line.215"></a>
<span class="sourceLineNo">216</span>    }<a name="line.216"></a>
<span class="sourceLineNo">217</span><a name="line.217"></a>
<span class="sourceLineNo">218</span>    @Override public SortedMap&lt;C, V&gt; headMap(C toKey) {<a name="line.218"></a>
<span class="sourceLineNo">219</span>      checkArgument(rangeContains(checkNotNull(toKey)));<a name="line.219"></a>
<span class="sourceLineNo">220</span>      return new TreeRow(rowKey, lowerBound, toKey);<a name="line.220"></a>
<span class="sourceLineNo">221</span>    }<a name="line.221"></a>
<span class="sourceLineNo">222</span><a name="line.222"></a>
<span class="sourceLineNo">223</span>    @Override public SortedMap&lt;C, V&gt; tailMap(C fromKey) {<a name="line.223"></a>
<span class="sourceLineNo">224</span>      checkArgument(rangeContains(checkNotNull(fromKey)));<a name="line.224"></a>
<span class="sourceLineNo">225</span>      return new TreeRow(rowKey, fromKey, upperBound);<a name="line.225"></a>
<span class="sourceLineNo">226</span>    }<a name="line.226"></a>
<span class="sourceLineNo">227</span><a name="line.227"></a>
<span class="sourceLineNo">228</span>    @Override public C firstKey() {<a name="line.228"></a>
<span class="sourceLineNo">229</span>      SortedMap&lt;C, V&gt; backing = backingRowMap();<a name="line.229"></a>
<span class="sourceLineNo">230</span>      if (backing == null) {<a name="line.230"></a>
<span class="sourceLineNo">231</span>        throw new NoSuchElementException();<a name="line.231"></a>
<span class="sourceLineNo">232</span>      }<a name="line.232"></a>
<span class="sourceLineNo">233</span>      return backingRowMap().firstKey();<a name="line.233"></a>
<span class="sourceLineNo">234</span>    }<a name="line.234"></a>
<span class="sourceLineNo">235</span><a name="line.235"></a>
<span class="sourceLineNo">236</span>    @Override public C lastKey() {<a name="line.236"></a>
<span class="sourceLineNo">237</span>      SortedMap&lt;C, V&gt; backing = backingRowMap();<a name="line.237"></a>
<span class="sourceLineNo">238</span>      if (backing == null) {<a name="line.238"></a>
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<span class="sourceLineNo">380</span>}<a name="line.380"></a>




























































</pre>
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